I made an RJ spagnols chilean malbec kit wine. Cru Select. The instructions said age at least 3 to 6 months, but if aging more than 6 months add sulphites. So I added 2 crushed campden tablets to six gallons at bottling. What effects do you think this would have in terms of preserving it and or anything else?

Thanks. I had read conflicting information. Some information seemed to suggest that MORE than the 1 tablet per gallon was needed. I will stick with 1tab per G next time. Assuming no benefit, how significant is the risk of this wine going bad after say 1 year?